We would like to announce that a firmware update for the SIGMA 100-400mm F5-6.3 DG OS HSM | Contemporary for CANON and SIGMA MOUNT CONVERTER MC-11 EF-E is now available.

This firmware update corrects the phenomenon that the OS mechanism does not operate properly when attached to the SIGMA MOUNT CONVERTER MC-11 EF-E.

For customers who own the SIGMA USB DOCK, please update the firmware via SIGMA Optimization Pro. For those who own the SIGMA MOUNT CONVERTER MC-11 EF-E, please update the firmware via SIGMA Optimization Pro by connecting it to a computer using a supplied USB Cable.

※ Before updating the MC-11 firmware, please ensure SIGMA Optimization Pro has been updated to ver. 1.4.1 or later for Windows, and ver. 1.4.0 or later for Macintosh from the following download page.